diff --git a/include/mbedtls/threading.h b/include/mbedtls/threading.h
index d2d79a1..a89fd64 100644
--- a/include/mbedtls/threading.h
+++ b/include/mbedtls/threading.h
@@ -97,8 +97,8 @@
  */
 extern mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex;
 extern mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex;
-#if defined(MBEDTLS_ECP_FUNCTION_ALT)
-extern mbedtls_threading_mutex_t mbedtls_threading_cryptohw_asym_mutex;
+#if defined(MBEDTLS_ECP_INTERNAL_ALT)
+extern mbedtls_threading_mutex_t mbedtls_threading_ecp_mutex;
 #endif
 #endif /* MBEDTLS_THREADING_C */